<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表</title>
</head>
<body>
    <ul>
        <li><a href="first.html" target="mainFrame" >首页</a></li>
        <li><a href="test.html" target="mainFrame" >测试</a></li>
        <li><a href="reg.html" target="mainFrame" >注册</a></li>
        <li><a href="exit.html" target="_top" >退出</a></li>
    </ul>
</body>
</html>